How do you open a mystery box?
By hovering over any of the Mystery Boxes, which start in the top left hand corner of the menu, you can see the quality and items in the box. Clicking on any of the Mystery Boxes will open the box. You can only open one box at a time! Once you have opened the box, it will display what you got in your Minecraft chat.
How many crystals are there?
There are 219 possible crystal symmetries (230 is commonly cited, but this treats chiral equivalents as separate entities), called crystallographic space groups.
What is the rarest crystal?
Painite : Not just the rarest gemstone, but also the rarest mineral on earth, Painite holds the Guinness World Record for it. After its discovery in the year 1951, there existed only 2 specimens of Painite for the next many decades. By the year 2004, there were less than 2 dozens known gemstones.